http://www.desmoinesregister.com/article/20120801/NEWS/120801044/0/opinion/?odyssey=nav|head
"Breault said the man in the photo went into the Casey's store at 1038 River Forest Road in Evansdale at about 2 p.m. July 13. That's about two hours after the girls were seen leaving a relative's house, and about two hours before firefighters found their bicycles near a bike trial on the southeast edge of Meyers Lake."
So why does LE think someone at that Casey's at 2 p.m. would know anything about the girls' disappearance? I was trying to think of reasons.
1. He saw something of interest (i.e., the girls on their bikes, a particular vehicle)
2. He didn't see something (i.e., someone said they were there, witness didn't see them)
3. He overheard something
Just speculating as to why the 2 p.m. time is of interest - I am not trying to sleuth any specific witness.